I suppose they would argue boys are allowed to experience a childhood that would ensure they're leaders, macho, etc due to them being encouraged to go on adventures, get dirty etc.

But they would consider a girls childhood to be a sort of social control as they're encouraged to play house, look after dolls, have a tea party or anything really ladylike or caring. And by doing these activities it would socialise them into fitting the appropriate role of a wife/mother.